Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation

Bernd Deutschmann, Gunter Winkler, Timucin David Karaca

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem KonferenzbandForschungBegutachtung

Abstract

Due to their high efficiency compared to conventional Class AB amplifiers, Class D audio amplifiers have increasingly become the amplifier of choice especially for low power applications such as portable electronics. However, Class D amplifiers are still a major source of electromagnetic emission of the electronic applications in which they are used. In this paper the benefits of using spread spectrum techniques in order to reduce the emission of Class D audio amplifiers is highlighted. Based on IC-level measurement results of a 10W Mono Class D speaker amplifier, that allows to be synchronized to an external clock, it is shown how spread spectrum parameters like deviation, modulation frequency and modulation signal can be optimized in order to maximize the reduction of the emission.
Originalspracheenglisch
Titel 2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo)
Herausgeber (Verlag)Institute of Electrical and Electronics Engineers
Seitenumfang6
ISBN (elektronisch)978-1-4673-7897-0
PublikationsstatusVeröffentlicht - Nov 2015
VeranstaltungInternational Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo) - Edinburgh, Großbritannien / Vereinigtes Königreich
Dauer: 10 Nov 201513 Nov 2015

Konferenz

KonferenzInternational Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo)
LandGroßbritannien / Vereinigtes Königreich
OrtEdinburgh
Zeitraum10/11/1513/11/15

Fingerprint

Modulation
Level measurement
Frequency modulation
Clocks
Electronic equipment

Schlagwörter

    Fields of Expertise

    • Information, Communication & Computing

    Treatment code (Nähere Zuordnung)

    • Experimental

    Dies zitieren

    Deutschmann, B., Winkler, G., & Karaca, T. D. (2015). Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation. in 2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo) Institute of Electrical and Electronics Engineers.

    Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation. / Deutschmann, Bernd; Winkler, Gunter; Karaca, Timucin David.

    2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo). Institute of Electrical and Electronics Engineers, 2015.

    Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem KonferenzbandForschungBegutachtung

    Deutschmann, B, Winkler, G & Karaca, TD 2015, Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation. in 2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo). Institute of Electrical and Electronics Engineers, Edinburgh, Großbritannien / Vereinigtes Königreich, 10/11/15.
    Deutschmann B, Winkler G, Karaca TD. Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation. in 2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo). Institute of Electrical and Electronics Engineers. 2015
    Deutschmann, Bernd ; Winkler, Gunter ; Karaca, Timucin David. / Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation. 2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo). Institute of Electrical and Electronics Engineers, 2015.
    @inproceedings{99ed89de1ecb480c8cc7905a1630d2bd,
    title = "Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation",
    abstract = "Due to their high efficiency compared to conventional Class AB amplifiers, Class D audio amplifiers have increasingly become the amplifier of choice especially for low power applications such as portable electronics. However, Class D amplifiers are still a major source of electromagnetic emission of the electronic applications in which they are used. In this paper the benefits of using spread spectrum techniques in order to reduce the emission of Class D audio amplifiers is highlighted. Based on IC-level measurement results of a 10W Mono Class D speaker amplifier, that allows to be synchronized to an external clock, it is shown how spread spectrum parameters like deviation, modulation frequency and modulation signal can be optimized in order to maximize the reduction of the emission.",
    keywords = "Class D Audio Amplifier, Common Mode Emission, IEC 61967, Spread Spectrum Technique, EMI",
    author = "Bernd Deutschmann and Gunter Winkler and Karaca, {Timucin David}",
    year = "2015",
    month = "11",
    language = "English",
    booktitle = "2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo)",
    publisher = "Institute of Electrical and Electronics Engineers",
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    T1 - Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation

    AU - Deutschmann, Bernd

    AU - Winkler, Gunter

    AU - Karaca, Timucin David

    PY - 2015/11

    Y1 - 2015/11

    N2 - Due to their high efficiency compared to conventional Class AB amplifiers, Class D audio amplifiers have increasingly become the amplifier of choice especially for low power applications such as portable electronics. However, Class D amplifiers are still a major source of electromagnetic emission of the electronic applications in which they are used. In this paper the benefits of using spread spectrum techniques in order to reduce the emission of Class D audio amplifiers is highlighted. Based on IC-level measurement results of a 10W Mono Class D speaker amplifier, that allows to be synchronized to an external clock, it is shown how spread spectrum parameters like deviation, modulation frequency and modulation signal can be optimized in order to maximize the reduction of the emission.

    AB - Due to their high efficiency compared to conventional Class AB amplifiers, Class D audio amplifiers have increasingly become the amplifier of choice especially for low power applications such as portable electronics. However, Class D amplifiers are still a major source of electromagnetic emission of the electronic applications in which they are used. In this paper the benefits of using spread spectrum techniques in order to reduce the emission of Class D audio amplifiers is highlighted. Based on IC-level measurement results of a 10W Mono Class D speaker amplifier, that allows to be synchronized to an external clock, it is shown how spread spectrum parameters like deviation, modulation frequency and modulation signal can be optimized in order to maximize the reduction of the emission.

    KW - Class D Audio Amplifier

    KW - Common Mode Emission

    KW - IEC 61967

    KW - Spread Spectrum Technique

    KW - EMI

    M3 - Conference contribution

    BT - 2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo)

    PB - Institute of Electrical and Electronics Engineers

    ER -